Ya, just make sure your toaster oven is hot already before placing the food. My parents always placed food first THEN turned the toaster oven on. And they keep wondering why the food turns out soggy...

I can only assume that your "stoneware" is the porous type and not glazed, candelbc. Were it glazed ceramic (which some people call stoneware) you would wind up with "soggy bottom" syndrome ... the same as heating on a baking sheet.

In an oven, under the broiler, or in a toaster oven ... the key is air circulation so that air gets under the food. If previously fried foods are heated directly on a baking pan (with no air circulation under it) the moisture collects and "steams" on the bottom of the food ... thus "soggy bottoms".

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"It ain't what you don't know that gets you in trouble. It's what you know for sure that just ain't so." - Mark Twain

If it is battered and fried fish you are talking about what I like to do is initially blanch it in the deep fryer, tyhen rest and cool on baking sheets lined with paper towel in the cooler. Then I just finish in the deepfrey per order.